2026-04-28T21:19:47Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/653072025-09-17T07:52:51Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

Murphy, B M Müller, M Stettner, J. Requardt, H Krisch, M Press, W Serrano Gutiérrez, Jorge 2024-01-30T11:57:47Z 2024-01-30T11:57:47Z 2008 J. Phys.: Condens. Matter 20 224001 (2008) 0953-8984 https://uvadoc.uva.es/handle/10324/65307 10.1088/0953-8984/20/22/224001 224001 22 Journal of Physics: Condensed Matter 20 1361-648X A brief overview of application of the grazing incidence inelastic x-ray scattering experimental method will be presented. Inelastic x-ray scattering in grazing incidence conditions provides a new tool for selectively studying both surface and bulk lattice dynamics in a single experiment. It is possible to study acoustic and optical surface phonon modes currently with a 3 meV resolution over a wide range of momentum space and make a direct comparison between surface and bulk dispersion. In particular the case of 2H-NbSe2 will be discussed. For this material a Kohn anomaly has been previously reported. Our data demonstrate that the softening of the Kohn anomaly at the 2H-NbSe2 surface is significantly greater than that reported for the bulk. This is an indication of a relaxation in the topmost layers of the crystal. application/pdf eng Institute of Physics info:eu-repo/semantics/openAccess Investigating surface dynamics with inelastic x-ray scattering info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion SI